Which county in California has the lowest natural disaster risk?

San Francisco has the lowest natural disaster risk in California, at 17.0.

What is the natural disaster risk in San Francisco?

San Francisco is ranked #1 in California for natural disaster risk, at 17.0.

What are the top counties in California for natural disaster risk?

San Francisco (17.0), then Los Angeles (22.7), and Sacramento (25.0). The full top 25 is in the table on this page.

How is this natural disaster risk ranking calculated?

Counties in California are ranked by natural disaster risk (FEMA National Risk Index, FEMA NRI v1.20), lowest first. Values describe the county, not an individual property. Source vintage is shown on the page.

How does California compare to the rest of the US for natural disaster risk?

This list is California only. See the national ranking of the lowest counties for natural disaster risk at hearthmap.app/best/lowest-natural-disaster-risk.

Lowest Natural Disaster Risk Counties in California (2026)

Lowest counties for natural disaster risk in California

Top 25 of 58 counties with data.

Ranked by natural disaster risk (FEMA National Risk Index, FEMA NRI v1.20), lowest first.

Lowest counties for natural disaster risk in California

Rank	County	Value
01	San Francisco17.0 County page
02	Los Angeles22.7 County page
03	Sacramento25.0 County page
04	San Mateo25.8 County page
05	Orange26.1 County page
06	Alameda29.0 County page
07	San Diego29.9 County page
08	Humboldt31.2 County page
09	Santa Barbara31.6 County page
10	Placer31.9 County page
11	Santa Clara32.7 County page
12	Alpine33.0 County page
13	Ventura33.9 County page
14	Solano34.4 County page
15	Yolo35.1 County page
16	El Dorado35.4 County page
17	Marin36.8 County page
18	San Bernardino37.2 County page
19	Kern37.6 County page
20	Santa Cruz37.7 County page
21	Fresno37.8 County page
22	San Joaquin38.1 County page
23	Contra Costa38.7 County page
24	Del Norte39.1 County page
25	Nevada39.5 County page

How this ranking works

This page ranks California counties by natural disaster risk, sorted so the lowest places appear first. Click any county to see its housing, schools, crime, and demographics in detail.

For natural disaster risk, a lower value is generally more favorable, so the top of the list is the lowest. Want to weigh natural disaster risk against schools, taxes, commute, and more at once? Use the live map to build a custom match.

Data comes from public sources. Source attribution and the exact data vintage are shown above and on the full map of natural disaster risk.

Frequently asked questions

Which county in California has the lowest natural disaster risk?: San Francisco has the lowest natural disaster risk in California, at 17.0.
What is the natural disaster risk in San Francisco?: San Francisco is ranked #1 in California for natural disaster risk, at 17.0.
What are the top counties in California for natural disaster risk?: San Francisco (17.0), then Los Angeles (22.7), and Sacramento (25.0). The full top 25 is in the table on this page.
How is this natural disaster risk ranking calculated?: Counties in California are ranked by natural disaster risk (FEMA National Risk Index, FEMA NRI v1.20), lowest first. Values describe the county, not an individual property. Source vintage is shown on the page.
How does California compare to the rest of the US for natural disaster risk?: This list is California only. See the national ranking of the lowest counties for natural disaster risk at hearthmap.app/best/lowest-natural-disaster-risk.